The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2008
Filed:
Jan. 10, 2007
Christian J. Rotchford, Austin, TX (US);
Brandt Braswell, Chandler, AZ (US);
Jiangbo Gan, Gilbert, AZ (US);
Michael L. Gomez, Tempe, AZ (US);
Gerald P. Miaille, Chandler, AZ (US);
Boris V. Razmyslovitch, Chandler, AZ (US);
Christian J. Rotchford, Austin, TX (US);
Brandt Braswell, Chandler, AZ (US);
Jiangbo Gan, Gilbert, AZ (US);
Michael L. Gomez, Tempe, AZ (US);
Gerald P. Miaille, Chandler, AZ (US);
Boris V. Razmyslovitch, Chandler, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.